Pulverizer.



N0. 799,990. PATENTED SEPT. 19, 1905.

v G. S. KNAPP.

PULVERIZERV APPLIOATION FILED OGT.15,1903.

2 SHEETS-SHEET 1.

a. r M

able vertically therein.

' tmrrnn STATES PATENT OFFICE.

GEORGE S. KNAPP, OF GRAND RAPIDS, MICHIGAN, ASSIGNOR OF ONE- HALF TO FRANK B. OHAPIN, OF GRAND RAPIDS, MICHIGAN.

PULVERIZERH Specification of Letters Patent.

Patented Sept. 19, 1905.

Application filed October 15, 1903. Serial No. 177,123.

To all whom, it may conccrm.

Be it known that I, GEORGE S. KNAPP, a citizen of the United States, residing at Grand Rapids, in the county of Kent and State of Michigan, have. invented certain new and useful Improvements in Pulverizers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art'to which it appertains to make and use the same.

My invention relates to improvements in pulverizers, and more especially to a device for pulverizing ores, rock, cement, and other like materials; and its object is to provide a simple, effective, easily-operated, and durable machine having certain new and useful features hereinafter more fully described, and particularly pointed out in the claims, reference being had to the accompanying drawings, in which Figure 1 is an end elevation of a device embodying my invention; Fig. 2, an end elevation of the revolving case and contents with one head of the case removed Fig. 3, a vertical section of the device on the line 3 3 of Figs. 1 and 2; Fig. 4, a reduced side elevation of the same, and Fig. 5 an end elevation of the small rolls.

Like letters refer to like parts in all of the figures.

A represents a suitable cylindrical case having its ends closed with suitable heads, said heads being provided with axial openings A, through which. the shaft O extends. The case is also provided with. dischargeopenings A near one end and surrounded by a hollow stationary receiving-band N opposite said openings, which. band is provided with a discharge-spout N at the bottom to discharge the pulverized material escaping through the openings A. case is provided with a suitable flange B, by which the case is supported upon suitable rolls B, mounted on rotative shafts B.

On the shaft O is a screw conveyer O to feed the material into the end of the case 0pposite the end of the same having the discharge-openings i D is a suitable trough or tube surrounding the conveyer O and extending through the opening A and mov- This tube D is pro- Each head of the vided with a suitable hopper D to receive the material, which hopper is also provided with an adjustable gate D to check and regulate the flow of material to the conveyer O. The shaft O is mounted in verticallymovable bearings E to one of which bearings the conveyer-trough and hopper are attached. These bearings are yieldingly forced down- Ward by heavy springs E, the tension of which springs is adjustable by means of caps F, engaging the springs and studs F, extending through saidcaps and provided with adjusting-nuts engaging the caps.

Mounted on the shaft O and in the axis of the case A is a large roll I, and surrounding said roll and contacting the lower side of the interior of the case are a number of smaller rolls I, which latter are provided with j our nals I at each end, which ournals are rotative in radial slots J in the respective heads of a suitable rotative'cage J and are also free to traverse said slots. are preferably made of suitable tubes L, provided with heads L, which heads are connected by bolts M to retain the heads in place, and the rolls are preferably filled with concrete K or other suitable material to increase their weight. Within this material are embedded tub es K, surrounding the bolts M to permit ready removal of the bolts when occasion requires. The machine can then be shipped without the filling K, and thus be made lighter to save freight. On the shaft O is also fixed a spur-gear G, engaging one side of a pinion H, mounted on a drivingshaft H, provided with a pulley I by which it may be connected to any convenient driving means, and on the head of the case A and in the plane of the gear G is an internal gear G, engaging the opposite side of the pinion H, whereby the case and roll I are rotated in opposite directions. The gears are so proportioned that the surface of the roll I and the inner surface of the case A will move at diflerent rates, (the case A preferably moving with greater speed.) .The rolls I, will thus slowly rotate about the axis of the roll I.

The operation of the device is as follows: The material to be pulverized is supplied tothe hopper D in any convenient manner and is discharged by the conveyer G into the end These rolls I and I of the case opposite the discharge-openings A and passing between the rolls 1 is crushed between. the same and the interior of the case. The shaft C being freely movable vertically, the entire system of rolls, this shaft, and everything mounted thereon, together with the pressure ofthe springs E, all operate to yieldingly force the rolls 1 downward upon the material. A vigorous crushing efl'ect is thus secured, and the pressure can in a large degree be varied by adjusting the tension upon the springs E. A being carried upon the friction-rolls B is supported and rotated under this heavy pres sure with but little expense of power. The rotation of the roll I in the direction opposite to that of the case A and at a different rate serves to bring the rolls 1 successively into action and to present successive portions of all of the rolls to the downward pressure and wear, thus equalizing the work upon the various crushing-surfaces. The rotation of the case A carries the material upward and discharges it by gravity between the various rolls, and thus mixes and stirs the material and gradually passes the same toward the discharge end of the case A, from whence it escapes, havingbeen repeatedly crushed, mixed, and thoroughly pulverized, whence it escapes through the openings A into the band N and is finally discharged through the spout N Having thus fully described my invention, what I claim, and desire to secure by Letters Patent, is-

l. The combination of a rotative case, means for passing material longitudinally through the case, a large roll near the axis of the case and movable vertically, and a series of smaller rolls surrounding the large roll and radially movable relative thereto, all of said rolls being supported by the lower side of the case.

2. A rotative case, means for passing material longitudinally through the case, a verticallymovable shaft near the axis of the case, a roll mounted on the shaft and of less diameter than the interior of the case, and a se ries of rolls between said roll and the case and vertically movable therein all of said rolls being supported by the lower side of the interior of the case.

3. The combination of a rotative case, means for passing material longitudinally through the case, a vertically-movable shaft near the axis of the case, a roller mounted on the shaft, a series of rolls between said roll and the interior of the ease, j ournal-bearings on the ends of said rolls, and a cage having radial slots to receive said bearings.

4.' The combination of a rotative case,

means for passing material longitudinally through the case, a shaft in the axis of the case and mounted m vertically-movable The case bearings, downwardly-acting springs engaging said bearings, means for adjusting the tension of the springs, a roll on the shaft and within the case, and a series of rolls between said roll and the case.

5. The combination of a rotative case, a verticallymovable shaft in the axis of the case, a roll on the shaft, a series of rolls between said roll and the interior of the case, a spur-gear on the shaft, an internal gear on the case, and a rotative pinion oppositely engaging said gears.

6. The combination of a rotative case, a shaft in the axis of the case, vertically-movable bearings for the shaft, a screw conveyer on the shaft, a tube and hopper attached to one of said bearings and extending within the case, a spur-gear on said shaft, an internal gear on the case, a pinion oppositely engaging said gears, a driving-shaft to operate the pinion, a roll on the shaft and within the case, a series of rolls between said roll and the case, ournals on the ends of the said series of rolls, and a cage having radial slots engaging said journals.

7. The combination of a rotative case having axial openings in its heads, flanges on the heads of the case, rolls engaging the flanges and supporting the case, discharge-openings in the case, a stationary hollow band surrounding the case and inclosing said openings and also having a discharge-opening at the bottom, a shaft in the axis of the case, a screw conveyer on the shaft, rolls within the case and engaging the lower side thereof, and

means for rotating the shaft and case at dif-' ferent speeds.

8. The combination of a rotative case, a vertically-movable shaft in the axis of the 'case, vertically-movable bearings for the shaft independent of the ease, springs engaging said bearings, 'means for adjusting the tension of the springs, a screw conveyer, a spur-gear, and a roll all mounted on said shaft, a series of rolls between the said roll and the interior of the case, journals on the ends of the series of rolls, a cage having radial slots engaging said journals, an internal gear on the case, and a pinion oppositely cngagin the gears on the shaft and case.

9. fn a pulverizer, a roll comprising a tubular body, detachable heads, inner tubes ITO the case, and a pinion between said gears and In testimony whereof I affix my signature oppositely englaging the same. 11 in presence of two Witnesses.

11. In a pn verizer, a rotative case, a ro in the axis of the case and journaled in ver- GEORGE KNAPP' 5 tically-movable bearings, means for rotating Witnesses:

the case and roll in opposite directions, and LUTHER V. MOULTON, a series of rolls between said roll and the case. FRANK B. CHAPIN. 

